Lister plow



h C HILL Feb. 2, 1932. Re. 18,348

2 Sheets-Sheet 1 Original Filed Oct. 3. 1927 mmmlm 4 3 "\Q/ 3/ 6 19 jig: 2. r 5 5 Chan/es INVENTOR.

A TTORNEYS.

c. HILL Re. 18,348

2 Sheets-Sheet 2 F ch. 2, 1932.

LISTER PLOW Original Filed Oct. 5, 1927 Char/ea /1///- 1 INVENTOR.

I BY flMJ-k ATTORNEYS.

Reissucd Feb. 2, 1932 v UNITED STATES PATENT OFFICE Original No. 1,780,448, dated November 19, 1928, Serial 1T0. 223,820,1lled October 8, 1927. Application for reissue filed January 7,1931. Serial No. 507,285. 7

construction and arrangement of the moldboards of a lister plow, although the principles of the invention may find embodiment vide a revolvin m subsoilers, drills, and other similar farm machinery.

O'nebf the objects of the lnvention 1s to provide an improved rotary mold-board construction for installation upon lister plows, the invention contemplating the provlslon of novel means whereby mold-boards, WlllCll are of the disk type, may be readily angularly adjusted, so as to rot-ate in dlflerent planes at different angles with respect to the share of the lister, such adjustment providing for operation of the lister with maximum efficiency, inasmuch as the angular dlsposltlon of the revolving mold boards may be varied.

in accordance with the conditions of the soil.

Another object of the invention is to promold-board attachment for listers and the like, embodying means for adjusting the angular disposition of the moldboard, and which adjusting means w1l 1 be capable of convenient and accurate ad ustment without the necessity of dismountmg the mold-boards, in order to effect such adjustment.

' Another object of the invention is to provide, in combination with the revolving moldboards, a novel share for attachment to the beam of the lister and so formed as to lift the soil and presentthe same to the revolving mold-boards in a manner to insure of functioning of the mold-boards with a maximum degree of efiiciency.

While the accompanying drawings and the description which is to follow, constitute a disclosure of the preferred embodiment of the invention, it will be understood that various changes may bemade within the scope of what is claimed.

- In the accompanying drawings:

Figure 1 is a side elevation of the structure embodying the invention.

Figure 2 is a top plan view thereof.

Figure 3 is a vertical section view through the structure shown in Figure 1 taken at a plane in advance of the revolving moldboards.

'Figure 4 is a vertical sectional view taken substantially on the line 4.-4 of Figure 2 looking in the direction indicated by the arrows.

In the drawings, the beam of the lister upon which the mold-boards and the share,

embodying the invention, are mounted,' is indicated by the numeral 1, and is of the usual construction, the same being provided with the usual forwardly directed and widened end 2 for attachment of the share which will presently be described.

The mold-board structure includes a supporting beam consisting of a channelled body 3 which is disposed to straddle the beam 1 and which is provided, at its opposite sides, with supporting wings 4 which extend downwardly and rearwardly at an angle from the portion 3 and which support the revolving mold-boards, in a manner which will now be explained. v

The mold-boards are indicated by the nu meral 5 and are of the disk type, and each of the mold-boards is supported upon a respective one of the wings 4 of the supporting member. The supporting means for each mold-board comprises a hub 6 which includes a hollow cylindrical body portion 7 which is formed at one end with a head 8 of circular form and disposed against the inner side of the respective mold-board 5 at the center thereof, the head being secured to the moldboard by means of screws or bolts 9. A bearing head 10 is assembled with the hub 6, being provided, centrally, with a hollow cylindrical neck 11 which is rotatably adjustablv fitted in the bore of the cylindrical body of the hub 6, that face of the body 10 which 10 is arranged in contact with the outer face of the respective supporting wing 4, as clearly shown in Figures 2 and 4 of the drawings. The purpose of the head 10 will presently be described.

In orderto provide for free rotation of the hub 6 about the neck 11 of the head 10 and therefore provide for free rotary movement of the disks 5, a bearing disk 14 is disosed against the outer face of the head 8 of the hub 6 and is received flush within a circular recess 15 formed in said face of the head, the disk 14 being clamped against the side of the disk 5 at the time the bolts 9 are tightened. The disk, 14 is formed centrally with an opening 16, and the portion ofthe disk which surrounds this opening is struck out to substantially conical form to provide a ball race indicated by the numeral 17, hearing balls 18 being arranged about this portion of the said disk 14 and within an annular race 19 formed in the end of the neck 11. A bolt 20 is fitted through the bore of the neck 11 and has a beveled head 21 which is received flush within the concave side of the struck-out central portion 17 of the head 14, the head of the bolt being confined between this portion of the disk 14 and that face of the mold-board disk 5 to which the hub 6 is secured. An opening 22 is provided in the supporting wing 4, and the threaded end of the bolt 20 is fitted through the said opening, and a nut 23 is fitted onto the end of the bolt and is adjusted to bear against a washer 24-likewise fitted on the bolt and held against the inner side of the wing 4. In order that the member 10 may be rotatably adjusted, for a purpose which will now be explained, it is provided at a point in its periphery, with an outwardly projecting lug or finger-piece 25 which may be grasped, for rotatably adjusting the head 10, when the nut 23 is slightly loosened.

From the foregoing description of this portion of the structure embodying the invention, it will be evident that the hub 6 of the disk 5, comprising the revolving moldboard, is free to rotate upon the neck 11 of the member 10, so that this neck constitutes, in effect, .a spindle for the said hub. It will also be evident by reference to Figure 2 of the drawings that, due to the angularly diverging disposition of the wings 4 of the attaching and supporting member 3, the bolts 20, the neck 11 ofthe head 10, and the cylindrical body 7 of the hub 6 of the mold-board disk 5, are concentrically arranged and extend forwardly and laterally at an angle to the line of draft of the lister, the hubs for the two'mold-board disks being oppositely angularly disposed, so that they are relatively arranged on forwardly diverging lines. As it will be desirable to vary the angular disposition of the mold-board disks 5, in accordance with different soil conditions, and

in order to render the disks most efficient in view of the conditions encountered,;the angular disposition of each disk maybe readily varied by slightly loosening. the respective nuts 23 and rotatably adjusting the respective head 10 which adjustment, due to the angular disposition of the outer face 13 of the head with respect to the axis of the head,

will result in angular adjustmentof the axis I of the member 10 with respect to theplane of the supporting wing 4. It willbe evident that this rotative adjustment of the members 10 may be readily effected, and that a wide range of adjustment of the mold-board disks is obtained.

In order that the furrows may be opened and the soil directed and elevated in a manner to substantially present it to the moldboard disks and thus provide for most effective action of the disks, a share, of the construction illustrated in Figures 1, 2 and 3 of the drawings, is preferably employed, and in combination with the disks, this share being indicated in general-by the numeral 26. The channeled body 3 of the attaching and supporting member of the structure is, of course, to be bolted or otherwise secured to the lister beam 1, and, in. order that the share 26 may be supported in proper position in advance of the mold-board disks 5, the forward por- 2 tion of the said member is flattened to provide an attaching and supporting head 27 to which the share 26 is bolted as indicated by the numeral 28. By reference to Figures 1,

2 and 3 of the drawings it will be observed that the share 26 comprises a blade 29 having a pointed forward end 30 and oppositely downwardly and laterally inclined side portions 31, the blade being secured to the head 27 of the supporting member with its longitudinal center line extending midway between the mold-board disks 5, and consequently in the line of draft of the lister. The rear portion of the blade 29 is extended up wardly, as indicated by the numeral 32, from the point of attachment of the said blade 29 to the head 27 of the supporting member, and this upwardly extended portion 32 of the blade comprising the share, is arranged at a rearward angle of inclination and is tapered in the direction of its upper end, its upper end portion being located immediately in advance of the forward upper sides of the moldboard disks and relatively close thereto.

It will be evident from the foregoing description of the share, that as the same passes through a furrow, the soil at the opposite sides of the furrow will be directed upwardly and rearwardly and therefore, as previously stated, substantially presented to the moldboard disks 5, thus insuring of most effective turning'aside of the soil by the disks.

In order that the disks may be substantially self-sharpening and likewise in order to obtain a more thoroughly side-wise deliv- I eryof the soil acted upon by the disks, the peripheral portion of each disk is outwardly flared or deflected, continuousl throughout its circumference, as indicate by the num'eral 33. I r

During operation, the dirt passesupward- 1y over the share 26 and the upwardly extending guard plate 32 and isspread laterall to some extent to open up the furrow. The dirt passing backwardly from the sides of the guard plate, 32 strikes the flat central portion of the disk mold-boards 5, the abruptness' of theffiat faces deflecting the dirt sharply outwardly and lessening the tendency for the dirt to pocket or collect against the disks 5.

As the lister is moved forwardly, the dirt is tumbled, rolled and broken up by its impact with, and its continued passage backwardly over the flat faces of the disks 5, and the dirt is given its final lift and outward throw by impact against the conical flange 33 which pre-- sents substantially a succession of flat outwardly inclined surfaces of impact. The rolling and falling of the dirt against these substantially fiat surfaces in two different planes at the central and edge portionsof the disks 5, rubs and grinds off any prior adhering dirt so that the disk mold-boards are practically self cleaning and prevent the balling up of the dirt.

It is well known from experience that dirt soon begins to build up on a disk of the usual type, and at times accumulates into a sizeable clod or chunk. With the present lister the dirt begins this building up, but after the plow is run a short distance, the continuously raised dirt from the share 26 strikes the adhering dirt on the disks with such force that the prior dirt is dislodged and projected upwardly clear off the disks 5, and absolutely cleans them, particularly where the soil is slightly sandy. This self cleaning action which keeps the face and edge portion of the (ill disk thoroughly bright, is possible not only 1 by reason of the peculiar relationship between the disks 5 and the share 26, but also on account of the peculiar shape of the disks,

each presenting in cross section a configuration in two solid planes which are at a dis-, tinct angle to each other.

While the angle of the disk 5 to the line of draft may be varied within practical limits, it must be such that the disk 5 takes the dirt from the share 26 and completes theopening of the furrow begun by the share and also piles the dirt from the share up on the ridge.

As illustrative of one practical mounting of the mold-board disks 5 the axes of the same maybe disposed at such an angle to the line of draft that the disks 5 converge forwardly and are spaced apart thereat a distance of substantially 2% inches while the disks 5 diverge rearwardly of their axes and are spaced apart thereat a distance of substantially ly to each other at an angle of substantially 58 degrees, and these disks, servin as moldboards, receive thedirt as it sli es oil the share 26 and thrusts the dirt outwardly and upwardly to complete the opening of the furrow begun by the share and forming opposed ridges at opposite sides of the furrow.

The disks, by virtue of the peculiar mounting above described, ma be disposed at an angle to the ground, an this angle may be approximately 10 degrees from the vertical although it will be .varied according to the work to be done. This angle of the disks with respect to the ground would be materially increased where the plow is used a second time through a furrow after it has once been formed and where there are weeds along the which is substantially of a depth of 2 inches. The cross sectional configuration of this conical flange 33 presents a straight line or transverse surface which extends .in a plane at an angle to the plane of the central portion of'thedisk.

The particular mounting and location of the disks 5 with respect to the share 26 relieves the disks from the complete work of opening the furrow as the disks in the present instance only assist or complete the work of opening the furrow already commenced by the share 26 and thus the edges of the disks receive less strain and wear imposed upon them than where the disks are used for initially opening the furrow. The shooting or thrusting action of the dirt oil from the disks has a tendency to work the edges of the disks down or wear them away and this effects a self sharpening of the disks when in use.

Having thus described my invention what I claim as new is 1 1. An adjustable revolving mold-board comprising. a supporting member, a moldboard disk, a hub having a cylindrical body portion and a head, means securing the head to the disk, a bearingdisk disposed against the face of the first mentioned disk, the head of the hub having a seat in its face which contacts the mold-board disk, the periphery of the bearing disk seating in said seat and the bearing disk having a central opening and a seat in its side which contacts the moldboard disk, a c lindrical member upon which the cylindrica bod of the hub is rotatably mounted, the mem er having a head rovided with a face at an angle to the axis the member and disposed against the support, a

bolt havin its head seating in the seat in the bearing dis ,-the last mentioned member having an axial Opening therein, the said bolt extending through sald opening and through 1 the supporting member, a nut threaded upon the bolt and bearing against the supportin member and maintaining the last mentioned member in positions of rotative adjustment upon the bolt, and anti-friction bearing elements arranged between the bearin disk and the inner end of the tubular .bo y of said member.

2. In a lister plow, a plow share having oppositely disposed openin blades for opening up a furrow and deflecting the raised earth to 0 posite sides and rearwardly of the share, an a pair of rotary mold-boarddisks arranged in rearwardly diver ing relation following the share, each disk liaving a fiat rotary deflecting surfaceand a'marginal conical portion extending outwardly and presenting a flat surface 1n a plane at an an 10 to the first mentioned flat surface, where y the earth is sharply deflected from all=portions of said disks. i

3. In a lister plow, a plow share having oppositely disposed opening blades for opening up a furrow and deflecting the raised earth to opposite sides'and rearwardly of the share, a pair of rotary mold-board disks arranged in rearwardly diverging relation fol-' lowing the share, each disk having a fiat rotary deflecting surface and a marginal conical portion extending outwardly and presenting a flat surface in a plane at an angle to the first mentioned fiat surface, whereby the earth is sharply deflected from all portions of said disks, and adjustable supporting means for thedisks for holding the same at a de- 4 sired angle relative to each other and to the plow share and at the desired height and distance relatively to the rear end of the plow share to accommodate the plow to soil of various conditions.

CHARLES HILL; 

